Rabies immunoglobin is a medication used after potential exposure to the rabies virus to help prevent rabies infection [1]. Here's a deeper look at how it works and its uses:
Function:
- Made from antibodies collected from the blood of people who have been vaccinated against rabies or who have recovered from a rabies infection [1, 2].
- These antibodies specifically target the rabies virus and help neutralize it, preventing the virus from establishing itself and causing infection [2].
Uses:
- Primarily used for post-exposure prophylaxis (PEP) after a potential rabies exposure [1, 3]. This means it's given after someone has been bitten, scratched, or licked by an animal that may be rabid, or if their mucous membranes (eyes, nose, mouth) have been contaminated with the rabies virus.
- Not a substitute for rabies vaccination [1]. Rabies immunoglobin provides temporary protection, while rabies vaccination is necessary to develop long-term immunity against the virus.
Administration:
- Rabies immunoglobin is typically injected around the wound site (infiltration) and another dose is given as an intramuscular injection into a muscle, usually the arm or buttock [1, 3].
Important Considerations:
- Rabies immunoglobin should be administered as soon as possible after potential exposure, ideally within 24 hours [1, 3].
- It should only be used under the supervision of a doctor or other healthcare professional experienced in rabies treatment [1].
- Potential side effects include pain, redness, and swelling at the injection site, fever, headache, and muscle aches [1].
- Rabies immunoglobin does not guarantee complete protection against rabies. It's crucial to complete the full course of rabies vaccination following the immunoglobin dose [1, 3].
Here are some additional points to remember:
- Rabies is a viral infection of the nervous system that is almost always fatal once symptoms develop [4].
- Anyone who suspects they may have been exposed to rabies should seek immediate medical attention [3].
- Prevention is key. Vaccination before potential exposure is the most effective way to prevent rabies infection [4].